ACT Science Practice Question #1220 (Medium (32)) | Test Citadel
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ACT Science Difficulty: Medium (32)

Digital ACT Science Practice Question #1220

Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.

An environmental biology lab measured the dissolved oxygen concentration (DO in mg/L) in a freshwater reservoir at varying depths during midsummer: • Depth 1 m: DO = 9.2 mg/L, Temp = 24.1 °C • Depth 5 m: DO = 8.6 mg/L, Temp = 21.3 °C • Depth 10 m: DO = 4.1 mg/L, Temp = 14.5 °C • Depth 15 m: DO = 1.8 mg/L, Temp = 8.2 °C • Depth 20 m: DO = 0.9 mg/L, Temp = 6.1 °C Based on these data, as water depth increases from 1 m to 20 m, how do water temperature and dissolved oxygen concentration change?
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Socratic AI Engine Step-by-Step Derivation
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⚡ 15-Second Desmos Speed Hack

Compare top depth (1 m: Temp 24.1, DO 9.2) to bottom depth (20 m: Temp 6.1, DO 0.9). Both numbers dropped significantly $\rightarrow$ Choice A.

Masterclass Solution & Distractor Trap Analysis

Reviewing the recorded values: temperature falls consistently from 24.1 °C at 1 m down to 6.1 °C at 20 m. Dissolved oxygen concentration also falls steadily from 9.2 mg/L at 1 m down to 0.9 mg/L at 20 m. Thus, both variables decrease monoto...

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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